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Reached Milestones and Ongoing Development on Replicant

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Reached Milestones and Ongoing Development on Replicant Reached milestones and ongoing development on Replicant Paul Kocialkowski [email protected] Sunday February 1st, 2015 Replicant “Replicant is a fully free Android distribution running on several devices, a free software mobile operating system putting the emphasis on freedom and privacy/security” ● Pragmatic way for software freedom on mobile devices ● Started in mid-2010: Openmoko FreeRunner and HTC Dream ● Fully free version of Android ● Ethical project that respects users ● Functional and usable daily ● Privacy enhancements (…) Replicant development Technical grounds: ● AOSP base at first ● CyanogenMod for more devices Implications of a fully free system: ● Remove or replace proprietary parts: executables, libraries, firmwares ● Get rid of malicious features tracking, statistics, etc Additional work: ● Adapt the system for the lack of proprietary components: graphics acceleration, firmwares loading ● "Branding”, look and feel ● Maintenance, security updates Replacing non-free software Have as many features available as possible! Reverse engineering: ● Long list of proprietary parts: graphics, audio, camera, sensors, RIL, hardware video decoding, etc ● Documentation is seldom available: [Chip maker] is not in a position to provide details of the formula we addressed with [OEM] phone team. ● Reverse engineering: logs, tracing, strings, decompiling, kernel driver, maths, frustration ● Understanding what's going on ● Writing free software replacements Hard tasks that Repicant doesn't deal with: ● Graphics acceleration, firmwares, modem system Replacing non-free software Free software replacements written for Replicant: ● RIL: Samsung-RIL, libsamsung-ipc: 30000 lines, 9 devices ● Camera: 5500-10000 lines, 2 devices ● Audio: 4500 lines, 3 devices ● Sensors: 3000-4000 lines, 8 devices Cooperation with other communities: ● SHR/FSO for libsamsung-ipc ● CyanogenMod/Teamhacksung for camera, audio ● Integration of work from Replicant (e.g. CyanogenMod) ● Technical advantages Replicant advancement timeline December 2010 January 2011 April 2011 Summer 2011 Replicant 2.2 HTC Dream Nexus One SDK libsamsung-ipc November 2011 January 2012 April 2012 September 2012 Replicant 2.3 Nexus S (I902x) Samsung-RIL Galaxy S (I9000) GTA04 November 2012 January 2013 April 2013 July 2013 Replicant 4.0 Galaxy Nexus (I9025) SDK Galaxy Tab 2 10.1 (P51xx) Galaxy S 3 (I9300) Galaxy S 2 (I9100) Galaxy Tab 2 7.0 (P31xx) October 2013 January 2014 June 2014 Replicant 4.0 Replicant 4.2 Galaxy Note (N7000) Galaxy Note 2 (N7100), SDK GTA04 Challenges in new devices Samsung devices: ● RIL: Samsung-RIL, libsamsung-ipc, device-specific transport Nexus S (I902x) , Galaxy S (I9000): ● Camera: preview, EGL ● Sensors: accelerometers, magnetic field sensors Galaxy S 2 (I9100), Galaxy Note (N7000): ● Audio: Yamahell, Yamaha-MC1N2-Audio, TinyALSA-Audio ● Camera: Exynos Camera Galaxy S 3 (I9300), Galaxy Note 2 (N7100): ● Camera: Exynos Camera rewrite, S5C73M3 interleaved format ● Sensors Replicant status Current status of Replicant: ● Lead by one developer, on spare time ● Very few external contributions ● Latest version: Replicant 4.2 ● Supports up to 12 different devices mostly Samsung Galaxy and Nexus devices ● Funded thanks to donations Taking a step back Taking a step back Bad modem isolation ! Taking a step back Proprietary and signed bootloaders ! What do we do now? Possible directions for Replicant: Idea #1: ● Catch up with mainstream Android devices ● Latest Android versions ● Free system, proprietary bootloaders ● Avoid known bad modem isolation Idea #2: ● Focus on better devices that allow free bootloaders ● Good or allegedly good modem isolation ● Take freedom to the next step! Why not make a fully free system out of [Tizen|Firefox OS|…]? Openmoko Neo FreeRunner (GTA02) First “historical” example of a good device: Back in 2008, the Openmoko Neo Freerunner (GTA02): ● Free PCB design ● Isolated modem ● No loaded proprietary firmwares ● Free bootloader ● Fully free GNU/Linux systems Currently: ● Old device (400Mhz CPU, 128Mb RAM) ● Openmoko retired ● Community retired ● A few systems are still alive Goldelico GTA04 In 2011-2012, Golden Delicious started the GTA04: ● Motherboard replacement for the Openmoko FreeRunner (GTA02) ● Complete units, other form factors (Letux) Reasonably efficient hardware: ● OMAP3 (DM3730), 800Mhz-1Ghz, 512Mib RAM ● Modem, GPS, sensors, Wi-Fi, bluetooth and more Goldelico GTA04: ● Free bootloader ● Supposedly good modem isolation ● Friendly manufacturer ● Ships with Debian ● Documented PCB design ● Documented chips protocols Goldelico GTA04 Early Replicant support: ● Started in mid-2012 (Replicant 2.3) ● Broken kernel, no suspend/resume, missing Android features ● Most hardware features missing ● Not usable GTA04 and Android kernels don't mix: ● Merge GTA04 support on Android kernels “Lost IRQs”, missing features, broken PM ● Merge Android support on GTA04 kernels merge issues, runtime issues Frustration: no Replicant on the GTA04 for a year or so Goldelico GTA04 A new hope: ● Linux 3.12 kernel from Goldelico, with reasonable support Android features merged but still PM issues ● Replicant 4.2 support from Goldelico ● Cooperation on the kernel, different userspaces ● Features: GPS, audio, lights, vibrator, Wi-Fi Goldelico Replicant 4.2: ● Single partition approach, multi-boot ● Other form factors ● WIP Hayes-RIL, Sensors ● Non-free Wi-Fi firmware Upstream Replicant 4.2: ● Android partitions scheme ● CWM recovery ● Encryption OpenPhoenux and the future OpenPhoenux community: Syndicates such projects: ● Dedicated to free software ● GTA04 and derivatives ● Aims to respect privacy ● Neo900 Plans for the future on Replicant: ● Features support: Hayes-RIL, sensors, bluetooth, etc ● Fully operational kernel ● Multi-devices support, single image More information: ● http://www.openphoenux.org/ ● http://www.gta04.org/ ● http://www.neo900.org/ Pre-order your GTA04A5 or Neo900! LG Optimus Black (P970) “A hacker's journey: freeing a phone from the ground up” ● Mainstream device by LG, released in 2011 ● OMAP 3630 platform ● Technical documentation leaked online EN_LG-P970_SVC_ENG_110415.pdf ● U-Boot and X-Loader source code released by LG ● OMAP GP (General Purpose) device! $ devmem 0x480022f0 16 0x0325 ● No signature checks ● Free bootloaders possible! LG Optimus Black (P970): Boot Running code on the device: ● SYS_BOOT5=0 (boot priority: MMC2 > USB) ● One resistor away… LG Optimus Black (P970): Boot Running code on the device: ● SYS_BOOT5=1 (boot priority: USB > MMC2) ● Let's remove R323! LG Optimus Black (P970): USB boot Tiny tiny resistor… Plug USB in and… tada (bootrom show up)! usb 3-1: new high-speed USB device number 15 using xhci_hcd usb 3-1: unable to get BOS descriptor usb 3-1: New USB device found, idVendor=0451, idProduct=d00e usb 3-1: New USB device strings: Mfr=33, Product=37, SerialNumber=0 usb 3-1: Product: OMAP3630 usb 3-1: Manufacturer: Texas Instruments LG Optimus Black (P970): UART Now what? ● Code loading works with omap-u-boot-utils' pusb ● But we're blind! Time to get some serial output (UART3): LG Optimus Black (P970): UART Now what? ● Code loading works with omap-u-boot-utils' pusb ● Seeing the light! LG Optimus Black (P970): Bootloaders Starting the actual work: ● Released version of LG's X-Loader ● Upstream X-Loader ● U-Boot from external sdcard (MMC1) ● I2C3 problem: LG Optimus Black (P970): U-Boot Adding proper support: ● Upstream U-Boot ● U-Boot SPL instead of X-Loader ● Reference (legacy) code from LG Current status: ● A few independent patches accepted ● Personal tree with WIP code git://git.code.paulk.fr/u-boot-sniper.git ● Basic support, muxing, external sdcard (MMC1) ● USB support (fastboot) ● Booting CWM recovery (with issues) LG Optimus Black (P970): Future U-Boot planned features: ● LCD video support ● Keys detection (run-time boot selection) ● USB connector UART ● Proper kernel boot ● Upstream support Plans for the future: ● Replicant support Hayes-RIL, sensors, … ● Replicant wiki documentation ● Upstream kernel support Missing features with free software: GPS, DSP, Wi-Fi/bluetooth Allwinner (sunxi) tablets Allwinner (sunxi) platforms: ● Linux-sunxi community: http://www.linux-sunxi.org/ ● Free bootloaders (upstream U-Boot, U-Boot SPL) ● Fully-featured legacy kernel (sunxi-3.4) ● Cheap Chinese tablets (often Wi-Fi-only) Replicant support (planned): ● Build system ● Support for various devices and platforms (sun4i, sun5i, sun7i) ● Single image for all platforms and devices sunxid, sunxi.prop, sunxi modules, Hayes-RIL device, configuration ● Installation script, CWM recovery Allwinner (sunxi) tablets Initial support for a handful of devices: ● Support depends on kernel drivers and userspace modules ● Linux-sunxi documentation ● Kernel drivers, script.fex ● Userspaces modules, sunxi.prop Add support for your own device! Other areas of (future) work Other interesting devices: ● Amazon Kindle Fire (first generation): OMAP 4430 GP ● More to discover! Replicant wiki: ● Samsung Galaxy Back-door ● Devices evaluation ● Privacy/security on devices, modem isolation ● Signed/proprietary bootloaders ● List of OMAP GP/HS devices, boot order ● Technical information (UART) Replicant Learn more about Replicant: ● Website: http://www.replicant.us/ ● Blog: http://blog.replicant.us/ ● Wiki/tracker: http://redmine.replicant.us/ Join the community: ● Forums ● Mailing list ● IRC channel: #replicant at freenode ● Get in touch and get involved! Say hi (and verify our GPG release key)! Text: ● © 2013-2015 Paul Kocialkowski Creative Commons BY-SA 3.0 license Images: ● Replicant robot, © Mirella Vedovetto, Paul Kocialkowski, Creative Commons BY-SA 3.0 license ● Openmoko Neo FreeRunner, © FIC/OpenMoko, Creative Commons BY-SA 3.0 licence ● OpenPhoenux logo, © Philip Horger Creative Commons BY-SA 3.0 license ● GTA04 board, © Golden Delicious Creative Commons BY-SA 3.0 license ● LG Optimus Black schematics, © LG Electronics ● Other, © Paul Kocialkowski Creative Commons BY-SA 3.0 license.
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